Abstract
Massive MIMO is one of the most promising technologies for the fifth generation (5G) mobile communication systems. In order to better assess the system performance, it is essential to build a corresponding channel model accurately. In this paper, a three-dimension (3D) two-cylinder regular-shaped geometry-based stochastic model (GBSM) for non-isotropic scattering massive MIMO channels is proposed. Based on geometric method, all the scatters are distributed on the surface of a cylinder as equivalent scatters. Non-stationary property is that one antenna has its own visible area of scatters by using a virtual sphere. The proposed channel model is evaluated by comparing with the 3GPP 3D channel model [1]. The statistical properties are investigated. Simulation results show that close agreements are achieved between the characteristics of the proposed channel model and those of the 3GPP channel model, which justify the correctness of the proposed model. The model has advantages such as good applicability.
Highlights
With the proliferation of wireless services, 5G system puts higher requirements on its capacity and link rates
A feasible 5G channel model should be established to practically evaluate the system performance. 5G massive Multipleinput multiple-output (MIMO) channel model is different from the conventional channel model [7]
We propose a non-stationary 5G massive MIMO channel model based on geometry-based stochastic model (GBSM)
Summary
With the proliferation of wireless services, 5G system puts higher requirements on its capacity and link rates. In [8], a theoretical non-stationary 3D twin-cluster channel model for massive MIMO communication systems is proposed. Because of the non-stationary property, the traditional MIMO channel model cannot be extended to massive MIMO, and a model which can be consistent with the general standards is needed. We propose a non-stationary 5G massive MIMO channel model based on GBSM. To the best of the authors’ knowledge, this is the first work to use a two-cylinder GBSM model in a 3D space to characterize the non-stationary property in multi-antenna array. The approximate value of radius of the visible sphere is calculated It describes the correlation between the channels of antenna elements.
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